Loom shuttle



06f. 30, 1951 1 J, KAUFMANN, JR 2,573,666

LOOM SHUTTLE Filed Sept, 19. 3.947

IN VEN TOR.

jo-n B Patented Oct. 30, 1951 vUNVrEo STATES PATENr, oEElcE LOOM SHUTTLE'to Steel Heddle Manufacturing Company,'

corporation lof' Pennsyl- Philadelpha, Pa., a wania YApplicationseptember 19, 11947',sria1n0. 774,901

This invention 'relates to shuttles for looms, and it relates moreparticularly tol improved threading means in shuttles of the automatictype.

In the shuttles which are used in modern types of high speed automa-ticlooms, a threading block isjusu'ally provided at the rear-endv ofl theshuttle. Suchthrea'dingblccks aremad-ein various shapes andi styles andare designed to cause the filling yarn, after an 'empty bobb'in has beendisplaced and a full one substituted therefor, to be threadedautomatically through the vthreading block and thence througha'side'delivery'eye. The threading action usually starts 'on'.the, firstpick ofthe shuttle and is completed on the'flrst return Apick thereof.

7 The presentl invention. contemplates the use of a threading block, themain or vbody portion ofY which is made of a casting of' iron, brass,orother suitable material having novel tensioningY means for the llingyarn, novel takeup mechanism therefor, and a novelconstruction andarrangement of the outlet eye.

vThe principal object'of the present invention is,v to provide a noveland efficient form of threading block for automatically threading loom.shuttles, the main or body portion of which may be made of a casting ofiron,. brass, -or other. suitableY material, having incorporated thereinimproved tension devices, improved takeup'mechanismvand an outlet eyeformed directly in the threadingblock casting.

A further object ofthe invention is to provide, in a shuttle threadingblockof' the character aforesaid, a novel form oftension pads which willfunction effectively not only as a first pick tension device, but alsofor the purpose of maintaining a constant frictional tension on theilling` yarn afterl the shuttle has been completely threaded.

A further object of the invention is to provide, in a shuttle threadingblock of the character aforesaid, improvedy means for taking up slack.in the filling'yarn whenever the same o'ccursrduring the operation ofthe loom,particul'arly at the times when reversal of movement of theyshuttle takes place. l

A further Aobject'of the invention is to provide, in a shuttle threadingblock of the` *characterv aforesaid, anovel form and arrangement of theside outlet eye,` the same `being formed' directly in' the threadingblock'cas't'hig.

The nature land characteristic'- features of thev invention willhemore"4 readily understood from the following description, takerr inconnection with the accompanying='d'rawingl forming partvv hereof, of'whichz 8 Claims. (Cl. 139-215) e 2 Figure 'l vis a top o r plan vviewof the threading end portion of a loom shuttle having a threading blockprovided with means embodying the main features of the presentinvention;A

Fig. '2 is a side elevation thereof; Fig. B is a longitudinal centralsectional view thereof; Y

Fig. 4 is a transverse' sectionv taken approximately on the line -floFig. l1; v Eg. v5 'is a 'transverse section takenapproximately on theline 5-'-5"of Figjl;

Fig. 6 'atransverse section taken approximately onth'e line 6"--6 ofFig. 1;* A

Fig?? .is a'perspectiveview, enlarged, illustrate inga` pair oftensionhpads of the novelform contemplated bythe present invention, thesame be, ing shown detached andslightly separated from each other; 'andVA y Fig'. 8 is" a Y'IJerspect'ive view, enlarged, of ,the tak'eup deviceforming part 'of the present inven-v tion, the same being shown,Aremoved from the threading block. Y V

It should, 'ci course', rbe understood lthat the description andd'rawingherein are illustrativer merely, and' that various mod'ications A'and'changes `may "be made in the structure disclosed without departing fromthe spirit of the inven-Y tion.

Referring to the dr'av'ving, in the particular embodiment of theAiny'erition therein shown, the shuttle body 'Nif may bernade 'of Woodor other` suitable material Vtind'has the usual bobbin cham'- ber' I"`Iin which the bobbin 1,12 is vheld 'by the usual means (nntV Shown)whereby it may be readily' discharged and a new 'bobbin substitutedasthe. lling yarnl 'runs out lfro'm 'time to time. l

The threading block 'i3 comprises a casting,- preferably made' 'ofmaterial such as cast iron, although bras'sor other material' may beused, as' desired.` Said 'threading block is mounted in accmplem'entally lshaped"recess I4 in the rearend cfth'eiibouyportionlfof the shuttle.`

' Thefbodyporticn of the threading block laf 'is provided with alongitudinal thread charme]A 4lli through which the filling yarn passesto the side delvery'eyel during the weaving operatior'r.v

The threading block' v'I3 is provided at its rearl end, on* oneside;with a rearwardly exten'c'iin'gA prong ITT, having' an enlarged headportion W and, on the other'side,fwth'the usual rearwardlyA extendingHorn portion "I9: coacting'with the head. portion `l`8`7of the prong I1,there being a guidf slot between' the end ofthe horn I9 and the sidesurface o f'the'head vportion I8 of thepr'ong" 'Attire forwardI fendi orthe threadingA block that is, at the end thereof toward the bobbinchamber, there is provided a lug portion 2| overhanging the threadchannel and serving to close the same with the exception of the threadentrance slot 22 provided on one side of the lug 2l.

The thread entrance channel thus provided at the forward end of thethreading block is countersunk as at 23 to facilitate the passage of thethread into the main thread channell I as the shuttle travels back andforth acrossz'the loom in the weaving operation.

Each of the tension pads 30-contemplated by nt ided itht o arms.4 thepresent mve lon 1S prov W' W A53 on the flower side, being suitablyshaped to disposed substantially at right angles to each other, the oneof said arms 3| being disposed at a slight angle to the horizontal, andthe -other of said arms 32 being disposed at a slight angle to thevertical. also preferably taperedtoward the forward end. Each `of thetension pads `30, at the `forward of. the horizontal arm 3| is providedwith a sidewi-se` extension 33. The sidewise extensions 33"a`repositioned in suitable apertures 34 in the side walls of the threadingblock. At the lower endofthe nearly-'verticalportion 32 of each tensionpad there is provided an aperture 35 through which apin `36 extends forthe purpose of maintaining the tension pads-1in their proper locationswithin, channel I5 ofthe threading block. The ends of the` pin 35 Yaremounted in the side walls of thethreading block I3 in the usual manner.

'Tletensio'ri' pads? are impelled toward each otherv .inthe usualmanner'by means of springs u tures lin the side wallspof the threadingblock www, I 1

The novel vtakeup device of thevpresent invention yis mountedl in thethread channel I5 of the block .l 3 and-.is shown in enlarged.perspective infFi'gLS'ofrthe drawing. The same comprises a' U-shapedmember 40 having one arm 4Iv thereof seeuredinja cylindrical plug 42which is pivoted inzonefotheside wall-portions of the body ofithethreadingblock I3. The other arm 43 of said 3 tiglritf-4 fit in thebody portion of the threading block, the arrangement being such Athatthe tension of the elastic strand 46 on the stud shaft will tend torotate the same and thereby raisev the transverse arm 48 of the U-shapedmember of thevtakeup device to its uppermost position.

One side arm 43 of the U-shaped member of the takeup device is providedwith a sidewise extending lug 49 adapted to encounter a portion ot thecasting of the threading block at the upper limit Aof its movement.

The other side arm 4I of the U-shaped member 40 also hasV an oiiset inwhich is mounted an upwardly extending pin 50 around which the fillingyarn passes on its way to the `outlet eye IBv during the operation ofthe loom.

Heretofore in-the construction of the threading-blocks of automaticallythreading loom shuttlesof this general type, it has been customary toprovide, on the lowerside of the rearwardly extending horn member, aninclined edge whichl served to guide the lling yarn, on the rst re- 4 Iturn pick of the shuttle, downwardly into the outlet eye. The outlet eyehowever was customarily mounted in the wooden body portion of theshuttle at the lower end of the downwardly l pins Oreyelets.

In the device of the present invention, the side ,delivery eye I6 isprovided directly in the lower end of the downwardly extending portionof the horn member, the same comprising an opening 5I having an eyelet52 made of hard materiall inserted therein. The eyelet 52 is also openas at guide the thread after it has traveled downward- `,ly along thelower inclined edge 54 of the horn The nearly horizontal arm. -3IAi'sv-v lwhich Vareadfiustably mounted in 'suitable proper, it will, inthe normal run of the shuttle, move outwardly through the eyelet 52 asthe shuttle is moved back and forth across the-loom during the weavingoperations.

Theoperation of the threading block of the present invention should bereadily understood. On the first pick of the4 shuttle, as the sametravels across the loom, the end of the yarn having been previouslysecured to a fixed part at the side .of the loom structure.- the samewill first be drawn' downwardly into the thread channel 2 of thethreading block through the slot 22 and will pass under the lug 2|.` w

VIn its passage the yarn Vwill'encounter the forward ends of the nearlyhorizontal arms of the tension pads,.and will pass between the same andat the same time the yarn will pass through the slot 20, between theforward end of the horn member I9 and the coacting portion of therearwardly extending prong I1 and will, at the same time, depress therear 'end of the U-shaped member40 of the takeup device.

As the shuttle passes across the loom on the rst pick the nearlyhorizontal arms 3l of the tension pads 30 will effectively serve as afirst pick tension device.

AOn the first return pickv ofthe shuttle, afterthe reversal of itsmovement takes place, the lling yarn will' be caused to pass downwardlyunder the lower. inclined edge 54 of the rearwardly extending horn I 9and guided thereby until the same passes into the'slot 53 of the eyelet52 which constitutes the delivery eye of the shuttle. 1 n

After `the yarn has been fully threaded in the shuttle, asaforesaid,upon the subsequent movements of the shuttle, as'the same passesback andVforth across the loon'ijthe yarn will pass outwardly through thedelivery eye, and as the reversal of movement takes place, the takeupdevice will serve to take up any slack which may occur in the fillingyarn.

` I claim: n ..1An automatically threading loom shuttle having athreading block the main or body portion of which comprises. a castingprovided with a thread channel extendinglongitudinally there-f through,said threading block having a side outlet eye .for the `passage of thelling yarn, the rear end portion of: said threading block beingprovidedfwith Vcoacting lugY and horn portions for guiding the yarndownwardly in its passage prising a` U-shaped member having a transversebar extending across the Ythread channel .and side.'

arms the ends of which are pivotally mounted in the side walls of thecasting, elastic tension mea-ns for raising the transverse bar of saidtakeup device, and a pin mounted on one of the side arms of the takeupdevice and around which the yarn passes to the side outlet eye.

2. An automatically threading loom shuttle having a threading block themain or body portion of which comprises a casting provided with a threadchannel extending longitudinally therethrough, said threading bloclrhaving a side outlet eye for the passage of the filling yarn, means forguiding the thread into the side outlet eye, a takeup device mounted inthe thread channel comprising a U-shaped member having a transverse barextending across the thread channel and side arms the ends of which arepivotally mounted in the side walls of the casting, elastic tensionmeans for raisingr the transverse bar of said takeup device, and aprojecting member mounted on one side of the takeup device and aroundwhich the yarn passes to the side outlet eye.

3. An automatically threading loom shuttle having a threading block themain or body portion of which comprises a casting provided with a threadchannel extending longitudinally therethrough, said threading blockhaving a side delivery eye for the passage of the filling yarn, a takeupdevice mounted in the thread channel comprising a U-shaped member havinga transverse bar extending across the rear end of the thread channel,and side arms having pivot members vat their forward ends said pivotmembers being pivotally mounted in the side walls of the casting, andelastic tension means for raising the transverse bar of said talieupdevice.

4. An automatically threading loom shuttle having a threading block themain or body por- -tion of Which comprises a casting provided with athread channel extending longitudinally thereth-rough, a takeup devicemounted in the thread channel comprising a U-shaped member having atransverse bar extending across the thread channel, and side arms theends of which are pivotally mounted in the side walls of the casting,elastic tension means for raising the transverse bar of said takeupdevice, and a projecting member mounted on one side of the takeup deviceand around which the yarn passes.

5. An automatically threading loom shuttle having a threading block themain or body portion of which comprises a casting provided with a threadchannel extending longitudinally therethrough, a takeup device mountedin the thread channel comprising a U-shaped member having a transversebar extending across the thread channel, and side arms the ends of whichare pivotally mounted in the side Walls of the casting, elastic tensionmeans for raising the transverse bar of said takeup device, and aprojecting member on one side of the takeup device and around which theyarn passes to the delivery eye of the shuttle.

6. An automatically threading loom shuttle having a threading block themain or body portion of which comprisesa casting provided With a threadchannel extending longitudinally therethrough, a takeup device mountedin the thread channel comprising a U-shaped member having a transversebar extending across the thread channel, and side arms the ends of whichare pivotally mounted in the side walls of the casting, elastic tensionmeans for raising the transverse bar of said takeup device, and a pinmounted on one of the side arms of the takeup device and around whichthe yarn passes to the delivery eye of the shuttle.

7. An automatically threading loom shuttle having a threading block themain or body portion of which comprises a casting provided with a threadchannel extending longitudinally therethrough, said threading blockhaving a side delivery eye for the passage of the lling yarn, la takeupdevice mounted in the thread channel comprising a U-shaped member havinga transverse bar extending `across the thread channel, and side arms theends of which are pivotally mounted in the side walls of the casting,elastic tension means for raising the transverse bar of said takeupdevice, and a pin mounted on the Side arm on the delivery eye side 0fthe takeup device and around which the yarn passes to said delivery eye.

8. An automatically threading loom shuttle having a threading block themain or body portion of which comprises a casting provided with a threadchannel extending longitudinally therethrough, said threading blockhaving a side delivery eye for the passage of the lling yarn, a takeupdevice mounted in the thread channel comprising a U-shaped member havinga transverse bar extending across the thread channel, and side arms theends of which are pivotally mounted in the side Walls of the casting,elastic tension means for raising the transverse bar of said takeupdevice, and a pin mounted on one of the side arms of the takeup deviceon the side toward the delivery eye and around which the yarn passes tothe side delivery eye.

JOHN J. KAUFMANN, JR.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 1,526,237 Rush Feb. 10, 19251,723,423 Hutchins Aug. 6, 1929 1,880,862 Davol Oct. 4, 1932 2,117,352Park May 17, 1938 2,247,286 Buffington June 24, 1941 2,288,677 Blanchardet al. July 7, 1942 2,324,949 Pavia July 20, 1943 .2,403,724 Kaufmann,Jr July 9, 1946 2,410,383 Kaufmann, Jr Oct. 29, 1946

